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authorAlexander Clouter <alex@digriz.org.uk>2010-07-06 00:11:26 +0400
committerRalf Baechle <ralf@linux-mips.org>2010-08-05 16:26:02 +0400
commitd16f7093b6eb4f3859856f6ee4ab504cbeeea0b9 (patch)
tree66e693d7562ffa2393b934f78e112bc2a9b59e41 /arch/mips/ar7
parent0d59050496db973d8689f954baf8a202ddd4d51a (diff)
downloadlinux-d16f7093b6eb4f3859856f6ee4ab504cbeeea0b9.tar.xz
MIPS: AR7: rewrite of cpmac_get_mac()
Shamelessly stealing wisdom from pasemi_mac.c, I found char2hex() could be replaced with a single call to sscanf(), looks cleaner to me at least. The result is 100 bytes trimmed off the size of a compiled cpmac_get_mac() and as an extra bonus it grumbles and gracefully fails over to using random_ether_addr() when an attempt to parse an invalid MAC address is made. Signed-off-by: Alexander Clouter <alex@digriz.org.uk> To: linux-mips@linux-mips.org Cc: florian@openwrt.org Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/ar7')
-rw-r--r--arch/mips/ar7/platform.c42
1 files changed, 15 insertions, 27 deletions
diff --git a/arch/mips/ar7/platform.c b/arch/mips/ar7/platform.c
index 8f31d1d59683..0da5b2b8dd88 100644
--- a/arch/mips/ar7/platform.c
+++ b/arch/mips/ar7/platform.c
@@ -292,40 +292,28 @@ static struct platform_device cpmac_high = {
.num_resources = ARRAY_SIZE(cpmac_high_res),
};
-static inline unsigned char char2hex(char h)
+static void __init cpmac_get_mac(int instance, unsigned char *dev_addr)
{
- switch (h) {
- case '0': case '1': case '2': case '3': case '4':
- case '5': case '6': case '7': case '8': case '9':
- return h - '0';
- case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
- return h - 'A' + 10;
- case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
- return h - 'a' + 10;
- default:
- return 0;
- }
-}
-
-static void cpmac_get_mac(int instance, unsigned char *dev_addr)
-{
- int i;
- char name[5], default_mac[ETH_ALEN], *mac;
+ char name[5], *mac;
- mac = NULL;
sprintf(name, "mac%c", 'a' + instance);
mac = prom_getenv(name);
- if (!mac) {
+ if (!mac && instance) {
sprintf(name, "mac%c", 'a');
mac = prom_getenv(name);
}
- if (!mac) {
- random_ether_addr(default_mac);
- mac = default_mac;
- }
- for (i = 0; i < 6; i++)
- dev_addr[i] = (char2hex(mac[i * 3]) << 4) +
- char2hex(mac[i * 3 + 1]);
+
+ if (mac) {
+ if (sscanf(mac, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
+ &dev_addr[0], &dev_addr[1],
+ &dev_addr[2], &dev_addr[3],
+ &dev_addr[4], &dev_addr[5]) != 6) {
+ pr_warning("cannot parse mac address, "
+ "using random address\n");
+ random_ether_addr(dev_addr);
+ }
+ } else
+ random_ether_addr(dev_addr);
}
/*****************************************************************************